package com.evl.config;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import com.swetake.util.Qrcode;

public class EncoderHandler {
	public void encoderQRCoder(String content, HttpServletResponse response) {  
        try {  
            Qrcode handler = new Qrcode();  
            handler.setQrcodeErrorCorrect('M');  
            handler.setQrcodeEncodeMode('B');  
            handler.setQrcodeVersion(7);  
              
            //System.out.println(content);  
            byte[] contentBytes = content.getBytes("UTF-8");  
              
            BufferedImage bufImg = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);  
              
            Graphics2D gs = bufImg.createGraphics();  
              
            gs.setBackground(Color.WHITE);  
            gs.clearRect(0, 0, 139, 139);  
              
            //设定图像颜色：BLACK  
            gs.setColor(Color.BLACK);  
              
            //设置偏移量  不设置肯能导致解析出错  
            int pixoff = 2;  
            //输出内容：二维码  
            if(contentBytes.length > 0 && contentBytes.length < 124) {  
                boolean[][] codeOut = handler.calQrcode(contentBytes);  
                for(int i = 0; i < codeOut.length; i++) {  
                    for(int j = 0; j < codeOut.length; j++) {  
                        if(codeOut[j][i]) {  
                            gs.fillRect(j * 3 + pixoff, i * 3 + pixoff,3, 3);  
                        }  
                    }  
                }  
            } else {  
                System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. ");  
            }  
              
            gs.dispose();  
            bufImg.flush();  
              
              
            //生成二维码QRCode图片  
            ImageIO.write(bufImg, "jpg", response.getOutputStream());  
              
              
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
}
